diff --git a/apps/emqttd/src/emqttd.app.src b/apps/emqttd/src/emqttd.app.src
index a61daf48e..2b78e3bdb 100644
--- a/apps/emqttd/src/emqttd.app.src
+++ b/apps/emqttd/src/emqttd.app.src
@@ -1,7 +1,7 @@
 {application, emqttd,
  [
   {description, "Erlang MQTT Broker"},
-  {vsn, "0.5.0"},
+  {vsn, "0.5.3"},
   {modules, []},
   {registered, []},
   {applications, [kernel,